Since he didn't have any tools at hand, Tong Chen only skinned the badger and took out the internal organs, he put the whole one together and roasted it on the fire, and finally roasted it for a while, and Tong Chen didn't worry about the meat quality deteriorating at the temperature of this weather, and the remaining meat was frugal, enough for the remaining days of food security.

However, these things are still difficult to make Tong Chen's heart completely satisfied, it's not that he is too greedy, but if the water source problem is not solved, just like the villagers in Weiyu Village, it seems that there is always a thorn in his heart, if he puts clean water and food together for Tong Chen to choose, he will still choose the water source at the first time, in the wilderness, the importance of water is still more important than food, after all, water is the source of life.

How can this be solved?

But this matter can only be said tomorrow, tonight is the most comfortable night since Tong Chen's mission, his stomach is full, and there is a fire to keep warm.

A new day is coming as scheduled, Wu Zhengxing also specially went to the Environmental Protection Bureau, to the relevant personnel to inquire and actually reflect the actual situation of Weiyu Village, first, he heard from others, there is still a trace of disbelief in the bottom of his heart, second, he wants to see in person the attitude of the Environmental Protection Bureau to Weiyu Village's environmental protection problems, if you can further change the problems encountered in the village, it would be great, as a result, Wu Zhengxing was disappointed, the Environmental Protection Bureau is ambiguous about this, neither directly refused to answer, nor specifically said a solution, which made Wu Zhengxing feel very aggrieved。

Returning to Weiyu Village again, Wu Zhengxing came to the village committee to ask relevant questions, and the village committee's answer was also very dissatisfied, they said, what are you doing as an outsider in our village?

For ordinary people, these encounters are enough for him to ignore them in a fit of anger, but for Wu Zhengxing, this makes him strengthen his inner thoughts.

Next, Wu Zhengxing immediately gave his own ideas to action, but how to do it, he made a difficulty, thinking about it, Wu Zhengxing can think of a more effective way for a person is to expose this thing that cannot be tolerated by everyone, but immediately he denied this method in his heart, this matter has been exposed to a certain extent on the Internet before, but the role is obviously minimal, and the same behavior again should not solve the problem.

Tong Chen simply ate some meat for breakfast on the fifth day, but after he had food supplements, he was more eager to drink a glass of clean water, and the routine search for dew every morning was a drop in the bucket for him, Tong Chen felt that his body was seriously dehydrated, so that after eating a lot of food, he still felt palpitations, and even his brain was a little abnormal.

After thinking about it for a long time, Tong Chen turned his head and saw the mineral water bottle thrown on the ground, and his paste-like brain suddenly opened up, and he finally thought of a way to deal with water.

There is no other water nearby, and the only way to do it is to dispose of the polluted water.

Tong Chen found a thin piece of stone, put it in the burning fire, and then waited for about ten minutes, he took two branches in his right hand as chopsticks to clip out the stone piece, and used it as a stone knife to carefully cut off a small part of the bottom of the mineral water.

Subsequently, Tong Chen found a relatively sharp stone in the same way, heated it on the fire like a step, and pierced a few irregular holes in the cap of the mineral water bottle.

After the container is made, it is time to prepare the materials for filtering the sewage, Tong Chen first found some dense weeds that are easiest to find similar to velvet, filled the narrow mouth of the mineral water bottle, compacted, and the first layer of filtration is done.

Charcoal, is a relatively excellent adsorption material, can absorb a lot of bacteria and other harmful substances, is used to make a filter is the most critical material, if there is no charcoal, so the filter is just not worthy of the name, Tong Chen's second filter material is ready to use the ready-made charcoal in the fire.

The size of the bottle determines how much it contains, and after choosing some charcoal to put in it, Tong Chen didn't dare to work hard, because charcoal is very fragile, and he doesn't want to drink some black charcoal water into his stomach.

The third layer of filter material is the last layer, Tong Chen chose the sand and gravel at his fingertips, and the ones he put into the bottle were as dense as possible fine sand and stones, which played a role in leaving the larger dirt in the sewage on it.

It didn't take much effort, a relatively simple water purification device was ready, Tong Chen took the filter to the stream, picked up the bottom of the cut off mineral water bottle with one hand as a small cup, scooped up a cup of yellow sewage and poured it into the filter.

The sewage is first filtered through fine sand, and the dirt that can be clearly seen in the water is first left in this layer, and then the sewage passes through the charcoal filter layer, and the water flow through this layer is significantly slower, and then the stream enters the last layer of weeds, and the remaining charcoal chips are also blocked in it, and the last thing that flows out is the filtered water.

Tong Chen also took out the plastic cup rewarded by the previous task in advance and connected the water that flowed out, and it was obvious that the color changed first, no longer the previous color, but it definitely did not become the crystal clear stream water in his imagination, but changed into light black water like washing water, which made people lose the desire to drink at a glance.

But Tong Chen does not have these taboos, after a glance or two, he picked up the cup and drank it into his stomach, a long drought and a rain, used to describe Tong Chen's mood at this time, although he has experienced similar things several times before, but every time Tong Chen really drinks water, that mood is still incomprehensible, and he can better understand the hard-won water, this experience is far from being comparable to the mouth in the classroom.

As for whether charcoal can really purify the bacteria or germs in the sewage, Tong Chen, who is seriously dehydrated, can't take care of it so much, in his opinion, charcoal doesn't have such a big ability, it can only play a basic filtering role, if it really has such a magical function, it is not normal.

After this step, the sewage may be slightly stronger than before filtration, but it should play more of a role as a psychological suggestion, if there is a condition, Tong Chen is more willing to boil the filtered water and drink it, which should be safer.

However, now Tong Chen has nothing, his hands are empty, everything can only be simplified, and the consequences of drinking can only be borne by himself, but he thought in his heart that even if there is something wrong now, when the task is over, he will have to go to the hospital for a good examination.

Knowing that drinking polluted water has a great impact on the body, but still having to drink it, this is also one of the biggest helplessness in the wilderness.